diff --git a/oxtimeline/video.py b/oxtimeline/video.py
index 47d4d77..5b48f53 100644
--- a/oxtimeline/video.py
+++ b/oxtimeline/video.py
@@ -126,7 +126,7 @@ class Timeline(Video):
             # we know we're prerolled when we get the initial thumbnail
             self._ready = True
         else:
-            _framePos = int(math.ceil((float(timestamp) / (gst.SECOND) * float(self.framerate))))
+            _framePos = int(math.ceil((float(timestamp) / (gst.SECOND) * float(self.framerate)))) + 1
             frame = frame.resize((1, self.tile_height), Image.ANTIALIAS)
             for framePos in range(self.lastPos, _framePos):
                 tile = int(math.floor(float(framePos) / self.input_tile_width))